NO130917B - - Google Patents
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- Publication number
- NO130917B NO130917B NO02832/69A NO283269A NO130917B NO 130917 B NO130917 B NO 130917B NO 02832/69 A NO02832/69 A NO 02832/69A NO 283269 A NO283269 A NO 283269A NO 130917 B NO130917 B NO 130917B
- Authority
- NO
- Norway
- Prior art keywords
- metal foil
- cable
- copolymer
- cable core
- foamable material
- Prior art date
Links
- 229910052751 metal Inorganic materials 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 29
- 239000011888 foil Substances 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 21
- 229920001577 copolymer Polymers 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 238000005187 foaming Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000004821 Contact adhesive Substances 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/20—Metal tubes, e.g. lead sheaths
- H01B7/202—Longitudinal lapped metal tubes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
- H01B7/2855—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using foamed plastic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
- Cable Accessories (AREA)
- Manufacturing Of Electric Cables (AREA)
Description
Fremgangsmåte til avtetning av kabler Procedure for sealing cables
mot langsgående vannstrømning. against longitudinal water flow.
Oppfinnelsen går ub på en fremgangsmåte til å avtebte kabler moi", langsgående vannstromning ved hjelp av oppskumbart materiale. Dette oppskumbare materiale, som f.eks. kan være et polyuretan-skum, blir bragt inn i kabelkjernen for kabelmantelen legges på. The invention is based on a method for dampening cables moi", longitudinal water flow by means of foamable material. This foamable material, which can for example be a polyurethane foam, is brought into the cable core before the cable sheath is laid on.
En tidligere foreslått kabel fremstillet efter denne metode har den ulempe ab der ved hjelp av det skumbare materiale rik-rigaok kan oppnås en tetning mot langsgående vannstromning i selve kabelkjernen, men at der mellom kabelkjernens bandasjering og den overliggende plastmantel såvel som mellom de enkelte bandasjeringslag fremdeles kan trenge fuktighet igjennom i lengderetningen, da banda-sjens enkelte lag hverken forbinder seg med hverandre eller med den overliggende plastmantel. Da heller ikke heftningen av det opp skumbare materiale til bandasjen alltid er fast nok, blir.der tilbake luftspalter i kabelens lengderetning. Gjennom disse kan der da sta-dig trenge fuktighet inn i kabelen i lengderetningen, og den onskede virkning med hensyn til avtetning mot langsgående vannstromning blir ikke oppnådd i en tilfredsstillende grad. A previously proposed cable produced according to this method has the disadvantage that, with the help of the foamable material, a seal against longitudinal water flow can be achieved in the cable core itself, but that between the cable core's bandage and the overlying plastic sheath as well as between the individual bandage layers still can penetrate moisture in the longitudinal direction, as the bandage's individual layers neither connect to each other nor to the overlying plastic sheath. Since the adhesion of the foamable material to the bandage is not always firm enough either, air gaps remain in the lengthwise direction of the cable. Through these, moisture can then constantly penetrate into the cable in the longitudinal direction, and the desired effect with regard to sealing against longitudinal water flow is not achieved to a satisfactory degree.
Det har også allerede i norsk patentskrift nr. 121.554 vært foreslått å omgi det oppskumbare materiale med etvidmasket • nett av polyetentråder og en aluminiumfolie som på begge sider er belagt med et skikt av copolymer. På grunn av den tosidig' belagte aluminiumfolie og på grunn av nettet av polyetentråder som i ethvert tilfelle behoves på grunn av labyrint-tetningen,blir denne metode meget kost-bar. It has also already been proposed in Norwegian patent document no. 121,554 to surround the foamable material with a wide-mesh net of polyethylene threads and an aluminum foil which is coated on both sides with a layer of copolymer. Because of the double-sided coated aluminum foil and because of the network of polyethylene threads which in any case is needed because of the labyrinth seal, this method becomes very expensive.
•- Den foreliggende oppfinnelse gir anvisning på en fremgangsmåte hvormed der med liten påkostning oppnås en absolutt avtetning av kabelen mot langsgående vannstromning. Oppfinnelsen består •- The present invention provides instructions for a method by which absolute sealing of the cable against longitudinal water flow is achieved at little cost. The invention remains
i at der over kabelkjernen efter innbringelsen, men for oppskumningen av det oppskumbare materiale blir anbragt en ensidig med en copolymer belagt metallfolie på en slik måte at dens metallside, som kan klebes til det skumbare materiale, vender mot kabelkjernen, og at kabelmantelen anbringes over metallfolien. in that a metal foil coated on one side with a copolymer is placed over the cable core after insertion, but before the foaming of the foamable material, in such a way that its metal side, which can be glued to the foamable material, faces the cable core, and that the cable sheath is placed over the metal foil .
Ved fremgangsmåten ifolge oppfinnelsen blir kabelen altså gjort absolutt tett på folgende måte: Kabelkjernen er avtettet ved innforingen av den nodvendige mengde skumstoff. Skumstoffet trenger ved oppskumningen frem mot metallsiden av den med copolymeren belagte metallfolie, som f.eks. kan være en aluminiumfolie. På grunn av det trykk som oppstår ved utvidelsen under skumningsprosessen, blir det ennu plastiske, klebende skum presset mot foliens metallside, så dets utvidelse blir begrenset av folien og det kleber seg sammen med metallsiden av denne. In the method according to the invention, the cable is thus made absolutely tight in the following way: The cable core is sealed by introducing the necessary amount of foam material. During foaming, the foam penetrates towards the metal side of the metal foil coated with the copolymer, which e.g. can be an aluminum foil. Due to the pressure created by the expansion during the foaming process, the still plastic, adhesive foam is pressed against the metal side of the foil, so that its expansion is limited by the foil and it adheres to the metal side of it.
Et utforelseseksempel på en kabel oppbygget i henhold til fremgangsmåten ifolge oppfinelsen er anskueliggjort i tverrsnitt på tegningen. An exemplary embodiment of a cable constructed according to the method according to the invention is shown in cross-section in the drawing.
For at tegningen skal bli så enkel og 'oversiktlig som mulig, er bare de deler som er vesentlige for oppfinnelsen,vist nærmere. In order for the drawing to be as simple and clear as possible, only those parts which are essential for the invention are shown in more detail.
1 betegner kabelkjernen, som er fullstendig innleiret 1 denotes the cable core, which is completely embedded
i det oppskummede materiale. 3 betegner metallfolien, som er belagt med copolymeren 2 og anbragt rundt kjernen. Rundt omkretsen av kabelen lukkes metallfolien ved å omboyes ved sommen resp. overlapnings- in the foamed material. 3 denotes the metal foil, which is coated with the copolymer 2 and placed around the core. Around the perimeter of the cable, the metal foil is closed by bending at the top or overlap
t t
stedet 4>°g det slik at lagene av copolymer blir liggende mot hverandre. place 4>°g it so that the layers of copolymer lie against each other.
Fabrikåsjonsteknisk er det ved den beskrevne metode gunstig om den med copolymer belagte metallfolie blir sammenklebet ved sommen 4 straks, den er lagt rundt den med oppskummet materiale forsynte kabelkjerne 1. Da sommen 4 ikke skal sammensmeltes ved hjelp av det skummende materiale, men såvidt mulig ved hjelp av de to mot hinannen liggende copolymerflater, må sammensmeltningen skje for det skumbare materiale bringes til å svelle opp, f.eks. ved var-metilforsel. Ellers ville det i radial retning skummende materiale trenge inn i sommen 4 og legge seg mellom lagene av copolymer i sommen og dermed forhindre en direkte kontaktklebeforbindelse av copolymerlagene med hverandre. Blir sommen 4 derimot tett sammenklebet for materialet skummes opp, fremkommer der på grunn av den lukkede metallfolie 3 en begrensning av utvidelsen av det skummende materiale, som derved - som allerede tidligere nevnt - kleber seg til foliens metallside. From a manufacturing point of view, it is advantageous with the described method if the copolymer-coated metal foil is glued together at the core 4 immediately, it is laid around the cable core 1 provided with foamed material. Since the core 4 is not to be fused together with the help of the foaming material, but as far as possible by with the help of the two copolymer surfaces lying against each other, the fusion must take place for the foamable material to swell up, e.g. in case of heat transfer. Otherwise, in the radial direction foaming material would penetrate into the sum 4 and settle between the layers of copolymer in the sum and thus prevent a direct contact adhesive connection of the copolymer layers with each other. If, on the other hand, the bottom 4 is tightly glued together for the material to be foamed up, due to the closed metal foil 3 there is a limitation of the expansion of the foaming material, which thereby - as already mentioned earlier - sticks to the metal side of the foil.
Over metallfolien 3 pålegges så kabelens yttermantel. Ved hjelp av den varme som tilfores ved påforingen av denne ytterman-te] , blir der oppnådd en sammenklebning av copolymerskiktet 2 på metallfolien 3 med kabelens yttermantel, som består av plast. På denne måte blir der mellom metallfolien 3 og kabelens yttermantel - som for enkelthets skyld ikke er vist nærmere - på grunn av mantelens sammenklebning med metallfolien oppnådd en absolutt tetning mot langsgående vannstromning. Da der på den annen side også er oppnådd en absolutt tetning mot langsgående vannstromning takket være sammen-klebningen av skummende materiale og metallfolie, har en kabel oppbygget i henhold til fremgangsmåten ifolge oppfinnelsen således som helhet den forlangte tetthet i lengderetningen. The cable's outer sheath is then placed over the metal foil 3. With the help of the heat that is applied when this outer sheath is applied, a bonding of the copolymer layer 2 on the metal foil 3 with the cable's outer sheath, which consists of plastic, is achieved. In this way, an absolute seal against longitudinal water flow is achieved between the metal foil 3 and the cable's outer sheath - which, for the sake of simplicity, is not shown in more detail - because of the sheath's bonding with the metal foil. Since, on the other hand, an absolute seal against longitudinal water flow has also been achieved thanks to the bonding of foaming material and metal foil, a cable constructed according to the method according to the invention thus has the required tightness in the longitudinal direction as a whole.
Da metallsiden av den belagte metallfolie 3 vender inn, altså mot kabelkjernen, vil der under tiden kunne kreves særskilte konstruktive forholdsregler i tillegg hvis f.eks. spenningsfastheten mellom metallfolien og lederne i det indre av kabelen skal okes. I As the metal side of the coated metal foil 3 faces inwards, i.e. towards the cable core, special constructive precautions may also be required in the meantime, if e.g. the tension strength between the metal foil and the conductors in the interior of the cable must be increased. IN
så fall kan der over kabelkjernen 1, efterat det oppskumbare materiale allerede er bragt inn, men ennu ikke er oppskummet, anbringes et vidmasket nett av kunststofftråder som omspyles allsidig av det svel-lende skum innen dette når metallsiden av metallfolien 3 og kleber seg fast der. Det vidmaskede nett virker som mekanisk distanserings-organ mellom metallfolie 3 og kabelledere og er fullstendig innleiret i det oppskummede materiale. in that case, after the foamable material has already been brought in, but has not yet been foamed, a wide-mesh net of plastic threads can be placed over the cable core 1, which is washed around by the swelling foam before it reaches the metal side of the metal foil 3 and sticks there . The wide-mesh net acts as a mechanical spacer between metal foil 3 and cable conductors and is completely embedded in the foamed material.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1765757A DE1765757C2 (en) | 1968-07-13 | 1968-07-13 | Process for sealing cables against longitudinal water |
Publications (2)
Publication Number | Publication Date |
---|---|
NO130917B true NO130917B (en) | 1974-11-25 |
NO130917C NO130917C (en) | 1975-03-05 |
Family
ID=5698592
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO2832/69A NO130917C (en) | 1968-07-13 | 1969-07-07 |
Country Status (8)
Country | Link |
---|---|
BE (1) | BE736007A (en) |
CH (1) | CH492285A (en) |
DE (1) | DE1765757C2 (en) |
FR (1) | FR2012930A1 (en) |
GB (1) | GB1220669A (en) |
NL (1) | NL6910636A (en) |
NO (1) | NO130917C (en) |
SE (1) | SE365645B (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1139169B (en) * | 1958-05-16 | 1962-11-08 | Osnabruecker Kupfer Und Draht | Process for the production of a longitudinally watertight conductor for electrical cables |
US3206541A (en) * | 1963-04-29 | 1965-09-14 | Gen Cable Corp | Sheathed electrical cable |
US3315025A (en) * | 1964-12-30 | 1967-04-18 | Anaconda Wire & Cable Co | Electric cable with improved resistance to moisture penetration |
US3332138A (en) * | 1965-08-11 | 1967-07-25 | Gen Cable Corp | Method and apparatus for making precision sized tubing |
-
1968
- 1968-07-13 DE DE1765757A patent/DE1765757C2/en not_active Expired
-
1969
- 1969-06-30 CH CH1003269A patent/CH492285A/en not_active IP Right Cessation
- 1969-07-03 SE SE09463/69A patent/SE365645B/xx unknown
- 1969-07-07 NO NO2832/69A patent/NO130917C/no unknown
- 1969-07-10 NL NL6910636A patent/NL6910636A/xx unknown
- 1969-07-11 FR FR6923779A patent/FR2012930A1/fr not_active Withdrawn
- 1969-07-11 BE BE736007D patent/BE736007A/xx unknown
- 1969-07-11 GB GB35079/69A patent/GB1220669A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1765757B1 (en) | 1972-03-09 |
BE736007A (en) | 1969-12-16 |
DE1765757C2 (en) | 1974-10-03 |
GB1220669A (en) | 1971-01-27 |
NO130917C (en) | 1975-03-05 |
CH492285A (en) | 1970-06-15 |
SE365645B (en) | 1974-03-25 |
FR2012930A1 (en) | 1970-03-27 |
NL6910636A (en) | 1970-01-15 |
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